Automatic engine stop



Feb. 1 192 v 7 c. E. HOOVER AUTOMATIC ENGINE STOP Filed Nov. 18, 1925gwwmtoz u h A m a H t a: U V n v In 9 m M i v .1 n I WEI; i Q U 3; l :2;E5 w 7 x 1.

C. .5. Hoover.

UV attouwqs Patented Feb. 1, 1927.

U NETE ST f S PATENT OFFICE.

AUTOMATIC ENGINE STOP.

Application filed November In water elevating means and particularlywhere a motor driven pump is employed to lift water and supply the sameto a tank, it is usually necessary to keep watch on the operation whenthe pump is working to prevent overflow of the tank and thisnecessitates attention and is frequently attendant with inconvenienceand discomfort especially in inclement weather when the tank and pumpare located some distance from the house.

The present invention obviates the objectionable features aforesaid andprovides means for automatically stopping the pump when the tank hasreceived the required amount of water, so that it is only necessary tostart the pump and when the tank has received the predetermined supplyof water, the pump is automatically thrown out of action.

While the drawings illustrate a preferred embodiment of the invention itis to be understood that in adapting the means to meet specific needsand requirements the design may be varied, and such other changes in theminor details of construction may be resorted to within the scope of theinvention as claimed, without departing from the spirit thereof.

For a full understanding of the invention and the merits thereof,reference is to be had to the following description and the drawingshereto attached, in which,-

Figure 1 is an elevational view of part of the tank showing a guide andstop means associated therewith embodying the invention, and

Figure 2 is a diagrammatic view, the pump and guide being in section.

Corresponding and like parts are referred to in the followingdescription and designated in both views of the drawings by likereference characters.

The numeral 10 designates a tank which is adapted to be supplied withwater from a suitable source by means of a pump 11, which may be of anymake so long as it is electrically operated. A float 12 is disposedwithin the tank 10 and rises and falls according to the change of levelof the water 18, 1925. Serial No.'69,907.

therein. A cord 13, or other suitable flexible connection, is attachedat one end to the float 12 and passes over guide pulleys 14 and 15 andis attached at its other end to a weight 16 which is mounted in asuitable guide 17, conveniently positioned and preferably attached tothe side of the tank 10. When the float 12 rises with the level of thewater in the tank 10, the weight 16 correspondingly lowers and when thefloat 12 descends, as the level of the water in the tank 10 recedes, theweight 16 is correspondingly elevated by the superior weight of thefloat 12.

As herein before stated, the pump 11 is of the type to be electricallyoperated and leads 18 and 19 extend from the motor and provide for shortcircuiting, or grounding of the motor, whereby the pump is automaticallystopped when the level of the water in the tank 10 reaches thepredetermined point. The weight 16 may be of metal, such as brass orcopper, and the lead 18 is connected thereto for movement therewith andthe lead 19 is connected to a metal plate 20, of brass or copper,located at the lower end of the guide 17. A pointed pin or bolt 21 isfitted to the weight 16 and when the latter reaches the limit of itsdownward movement, the point of the pin or bolt 21 makes contact withthe plate 20, thereby short-circuiting or grounding the motor of thepump 11 and causing the latter to stop.

From the foregoing it will be readily understood that the inventionprovides means for automatically stopping the pump after the latter hassupplied the required amount of water to the tank, thereby obviating theannoyance, inconvenience and discomfort attendant upon keeping watchupon the tank and pump to prevent the tank from overflowing.

Having thus described the invention, I claim:

In combination, a tank, an electrically operated pump for supplyingwater thereto, a guide upon the outer side of the tank, a weightdirected in its movement by said guide, a float within the tank andactuated by the change of level of the water therein,

a flexible connection between the float and the pointed element of theweight, and a weight to cause both to move in unison, lead connectingsaid plate with the pump 10 guide pulleys receiving the flexibleconnecmotor, whereby upon descent of the weight, tion, the one at thetop of the guide and the the motor is short-circnited or groundedotheiflat the top of the tank, a pointed ele and the pump automaticallystopped.

ment carried by the weight, a lead from the In testimony whereof I afiixmy signature. pump motor connected to the weight, a plate at the lowerend of the guide in the path of CECIL E. HOOVER. [L. s.]

